Python dict and list comparison

Python built-in dictionary: dict support, Dict full name dictionary, also known as map in other languages, using key-value (Key-value) storage, with extremely fast search speed

Use Help (Dict) to find dict-related function actions

For example: dt = dict (name= ' test ', age=20, score=90)

Special Note: 1, the Order of dict internal storage and key into the order is not related.

2. The Dict key must be an immutable object (Dict calculates the storage location of value based on key, which is known as the hash algorithm, which is the algorithm for calculating position by key)

Dict and List comparison:

Dict: Advantages: Find and insert very fast, not slow with the increase of key

Cons: It takes a lot of memory to waste more memory

List: Cons: Finding and inserting time increases as the element increases

Advantages: Small footprint, less space wasted memory

So Dict is a way of exchanging space for time, using lists and dict to distinguish between specific scenarios

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Python dict and list comparison